Kind of AI. I think it’s Adobe generative fill. There was probably something in the way, and someone has used the generative fill tool to make the cow have legs, but didn’t check or edit it after too make sure it looked correct haha

Could be AI, but I think all their legs are a bit off, but the tops of the cows seem okay, so I reckon something was blocking the cows legs in the photo, and and editor has used that tool to ‘fix’ it